Where is the lead exposure risk in your community?

In some of America’s oldest and largest urban areas, places like New York and Chicago, one in five census tracts — geographic areas that usually have between 1,200 and 8,000 people — have very high risks of lead exposure.

In younger metro areas, like Los Angeles, risks are smaller but still present; 12 percent of census tracts there have risk scores of 10. And it’s important to remember that public health experts say no level of lead exposure is safe for children.